package method1;

/**
 * 懒汉式，线程不安全
 * 这种实现一定不能使用
 */
public class Singleton {

	private static Singleton instance;
	
	private Singleton(){}

	public static Singleton getInstance(){
		if(instance == null){
			instance = new Singleton();
		}
		return instance;
	}
}
